* Binding and Stress: When driving in 4WD on a dry, paved surface, the front and rear axles are forced to rotate at slightly different speeds due to the different wheel paths. This causes stress on the drivetrain components, especially the transfer case and differentials. Going in reverse briefly allows the components to re-align and reduces the binding that can occur if 4WD is disengaged while moving forward.
* Manual Locking Hubs/Differentials: Some vehicles with 4WD have manual locking hubs or differentials. These need to be unlocked after use. Driving in reverse often helps to disengage them properly, preventing damage. If you don't disengage the hubs before switching back to 2WD and driving on pavement, you can cause significant damage to the drivetrain.
* Preventing Damage: The sudden shift from 4WD to 2WD while driving forward can put a lot of stress on the drivetrain, potentially leading to wear and tear or even breakage. Reversing helps to minimize this stress.
Important Note: Modern vehicles with automatic 4WD systems often don't require reversing. The system automatically manages the engagement and disengagement of the front axle, minimizing the need for this procedure. Always consult your vehicle's owner's manual for the correct procedure. It's the best source for specific instructions related to your 4WD system.
